The two pressures of the measured medium pass into the high and low pressure chambers, and act on the isolation diaphragms on both sides of the delta element (ie, the sensitive element), and are transmitted to both sides of the measurement diaphragm through the spacer and the filling liquid in the element.Capacitive transmitters are composed of a measuring diaphragm and electrodes on both sides of the insulating sheet.When the pressure on the two sides is inconsistent, the measurement diaphragm is displaced. The displacement is proportional to the pressure difference, so the capacitance on both sides is not the same. Through the oscillation and demodulation links, it is converted into a signal proportional to the pressure.Capacitive pressure transmitters and capacitive absolute pressure transmitters work the same as differential pressure transmitters, except that the pressure in the low-pressure chamber is atmospheric or vacuum.The A / D converter of the capacitive transmitter converts the current of the demodulator into a digital signal, and its value is used by the microprocessor to determine the input pressure value.In addition, it performs operations such as sensor linearization, resetting the measurement range, engineering unit conversion, damping, rooting, and sensor trimming, as well as diagnostics and digital communications.Analog characteristics1. High accuracy Analog accuracy: + (-) 0.75% + (-) 0.1% FS2.The range and zero are continuously adjustable externally3. Good stability4, positive migration can reach 500%, negative migration can reach 600%5. Second-line system6, adjustable damping, resistance to over-voltage7.Solid sensor design8, no mechanical moving parts, less maintenance9. Light weight (2.4kg)10.The entire series has a unified structure and strong interchangeability11, miniaturization (166mm total height)12.The material of the diaphragm that contacts the medium is optional13, unilateral anti-overpressure14. Intelligent features of low-pressure cast aluminum alloy shell:1. Super measurement performance for pressure, differential pressure, liquid level and flow measurement2. Digital accuracy: + (-) 0.05% Full performance: + (-) 0.25FS3. Stability: 0.25% for 60 months4. Range ratio: 100: 15. Measurement rate: 0.2S6. Miniaturized (2.4kg) all stainless steel flange, easy to install7. The process connection is compatible with other products to achieve the best measurement8. The only sensor (patented technology) with H alloy sheath in the world, which achieves excellent cold and heat stability9.Smart transmitter using 16-bit computer10. Standard 4-20mA, with digital signal based on HART protocol, remote control11. Support the upgrade to fieldbus and field control-based technology.